Blockbuster, Lawson Software and VeriFone Holdings all rose on a day marked by strong gains by the three major U.S. indexes. A. Schulman shares drooped on downbeat guidance.

Shares of the movie-rental chain scored significant gains following an upgrade at Citigroup to Buy from Hold. The rating change follows Blockbuster's decision to offer a new, lower-priced online-only rental plan to supplement the existing Total Access program, which combines in-store and online service. In a research note, analyst Tony Wible wrote, "We believe the price cut improves Blockbuster's strategic position as it can be used to gain market share, help control Total Access dilution, and pave the way...